Step 1
If Citra is already running, restart it first.
Navigate to Emulation -> Configure (Citra -> Preferences on Mac) and in the Debug tab, click on Open Log Location.
Make sure the Global Log Filter is set to *:Info before continuing to Step 2.
Step 2
Run the game you are having issues with until it reaches the point where it crashes or encounters the bug. Exit out of CItra.
Step 3
In the window that you opened in Step 1, the log will be in citra_log.txt. Do not relaunch Citra or else the citra_log.txt file will be overwritten. Upload (drag & drop) this file to your support post as a file attachment.
If you accidentally relaunched Citra, upload the citra_log.txt.old.txt file instead.
You’re done!
What to do if your copy of Citra cannot boot:
Step 1
Navigate to your appdata folder.
For Windows users: Paste %appdata%/Roaming/Citra/log into your explorer address bar, and it should take you there.
For Linux/Mac users: In the terminal, type echo $XDG_DATA_HOME . This command will print out the user-specific data directory. If nothing gets printed out, that means the directory hasn’t been changed and the log is present in ~/.local/share/citra-emu/log . If something has been printed out, however, you should follow that directory instead and manually navigate to /citra-emu/log there.
Step 2
In appdata/roaming/citra/log, look for the file labeled ‘citra_log.txt’.
Step 3
Upload that file, just like step 3 on the other set of directions.